What is the HydraPak PackFlask 500ml?
The HydraPak PackFlask is excellent for those who prioritise speed, efficiency, and convenience on the trail. It integrates directly into your pack harness — keeping water within easy reach. When not in use, the soft flask collapses flat for effortless storage, saving valuable space in your pack. It's ideal for minimalist adventurers seeking to reduce weight without compromising reliability or functionality.
What is it made of?
Constructed from a blend of TPU, PP, Silicone, POM, TPE, Polyester, EVA, and Nylon, the PackFlask delivers an exceptional combination of flexibility, strength, and durability. The TPU body, featuring RF-welded seams, ensures long-term resistance to wear, punctures, and abrasion while maintaining a lightweight feel.
All materials are BPA- and PVC-free, ensuring clean-tasting water and long-lasting performance even in demanding environments. This multi-material construction strikes a perfect balance between softness for comfort, structure for stability, and toughness for repeated use on the trail.
What are its features?
Instant Access
The PackFlask includes a stretch mesh pouch that attaches securely to your backpack harness, keeping hydration immediately accessible while you're on the move. The elastic pouch also doubles as a convenient pocket for small essentials such as snacks, a map, or a phone when the flask isn't in use.
Packable and Space-Saving
When empty, the flask collapses completely flat — simply flatten, roll, and stash it in your pack or pocket. This compact design eliminates bulk, making it ideal for ultralight adventurers and long-distance hikers who count every gram.
Easy Drinking
The high-flow self-sealing silicone nozzle provides smooth, splash-free hydration while moving, with no need to tilt or squeeze excessively. It's perfect for quick sips mid-stride or steady hydration on climbs.
Hygienic Dust Cover
A protective dust cap shields the nozzle from dirt, mud, and bacteria, keeping your drinking surface clean even in harsh trail conditions. It opens and closes effortlessly with a one-handed flip, maintaining convenience and hygiene in the field.
Filter Compatible
The flask's 42mm threaded neck is compatible with most standard water filters, allowing you to use it as a lightweight squeeze system — an excellent feature for longer treks or unsupported routes where refilling from natural sources is essential.
Light and Durable Construction
Weighing only 79g (2.8oz), the PackFlask is lighter than traditional hard bottles yet built to last. Its RF-welded TPU construction ensures long-term durability while maintaining flexibility and comfort against your pack or body.
Features:
- Stretch mesh pouch attaches to your pack harness for hands-free hydration
- Collapsible flask packs flat when empty — simply roll and stash
- High-flow self-sealing nozzle for easy, spill-free drinking
- One-handed dust cover keeps the nozzle clean on the move
- Compatible with most 42mm threaded water filters
- Lightweight and durable TPU body with RF-welded seams
- Doubles as a small stash pocket for phone, snacks, or maps when the flask is removed
- BPA- and PVC-free materials for safe, clean hydration